Loud pipes have a couple of significant disadvantages. Most important one is, that they are annoying to non-motorcyclists and contribute to anti-motorcycle opinions in the public.One other important one is that they require a retune and rejetting of the carbs. A louder pipe, in most cases, has less interior restriction thus requiring a different intake mixture.The Supertrapps are the loudest ones I know, if used with more than six tuning discs or an open end-plate.

Kerkers aren't that loud and the 6 into 2's don't require rejetting. The Pipemasers 6 into 6's are a good bit louder and they don't require rejetting either. Modifications to the intake side (removing the airbox and going with something else) seems to have more effect on jetting than changes to the exhaust side of things

I agree that for me anyway, the stock pipes are just too darned quiet, though they do allow you to hear every single moving part within the engine. I had Kerker 6 into 2's on my first CBX and much preferred the sound (and the look) to the stock pipes. I have the Pipemasters on my current bike and prefer both the sound and the look to anything else times 3X. Spendy, true . . . . but they look and sound like nothing else